小编San*_*mar的帖子

我遇到了崩溃问题我们面临的一个空指针异常仅与奥利奥的自动填充相关.下面是堆栈跟踪

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method
'boolean com.android.server.autofill.RemoteFillService$PendingRequest.cancel()' on a null object reference
  at android.os.Parcel.readException(Parcel.java:1965)
  at android.os.Parcel.readException(Parcel.java:1905)
  at android.app.IActivityManager$Stub$Proxy.reportAssistContextExtras(IActivityManager.java:8297)
  at android.app.ActivityThread.handleRequestAssistContextExtras(ActivityThread.java:3210)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913)
  at android.os.Handler.dispatchMessage(Handler.java:105)
  at android.os.Looper.loop(Looper.java:164)
  at android.app.ActivityThread.main(ActivityThread.java:6944)
  at java.lang.reflect.Method.invoke(Method.java)
  at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Caused by android.os.RemoteException: Remote stack trace:
  at com.android.server.autofill.RemoteFillService.cancelCurrentRequest(RemoteFillService.java:177)
  at com.android.server.autofill.Session.cancelCurrentRequestLocked(Session.java:465)
  at com.android.server.autofill.Session.access$1000(Session.java:118)
  at com.android.server.autofill.Session$1.onHandleAssistData(Session.java:322)
  at com.android.server.am.ActivityManagerService.reportAssistContextExtras(ActivityManagerService.java:14713)

这并没有说明为什么会发生这种情况的确切原因.

您好，我正在尝试构建我的 flutter 应用程序（调试/发布）。直到昨天一切都很好，但今天从早上开始如果我构建我的应用程序（调试/发布），我将面临以下异常

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':app:processDevDebugResources'.
> Could not resolve all task dependencies for configuration ':app:devDebugRuntimeClasspath'.
   > Could not resolve com.google.android.gms:play-services-location:16.+.
     Required by:
         project :app > project :location
      > Failed to list versions for com.google.android.gms:play-services-location.
         > Unable to load Maven meta-data from https://google.bintray.com/exoplayer/com/google/android/gms/play-services-location/maven-metadata.xml.
            > Could not get resource 'https://google.bintray.com/exoplayer/com/google/android/gms/play-services-location/maven-metadata.xml'.
               > Could not GET 'https://google.bintray.com/exoplayer/com/google/android/gms/play-services-location/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

这些是我的 Flutter 和 …

您好，我在同步项目时遇到问题。同步成功后我收到警告

我不知道为什么我会收到这个警告。如果单击构建窗口中的警告，则会收到此消息

图像中的消息是

org.gradle.internal.resource.transport.http.HttpRequestException: Could not HEAD 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.2/gradle-3.1.2.pom'。

造成原因：

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

如果点击url

https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.2/gradle-3.1.2.pom比得到此消息 -

{
  "errors" : [ {
    "status" : 404,
    "message" : "Could not find resource"
  } ]
}

我在用

 classpath 'com.android.tools.build:gradle:3.1.2'
 classpath 'com.google.gms:google-services:3.3.0'

和

 implementation "com.android.support:appcompat-v7:${support_version}"
    implementation "com.android.support:design:${support_version}"
    implementation "com.google.firebase:firebase-core:${play_version}"
    implementation "com.google.firebase:firebase-config:${play_version}"
    implementation "com.google.firebase:firebase-messaging:${play_version}"
    implementation "com.google.android.gms:play-services-tagmanager:${play_version}"
    implementation "com.google.android.gms:play-services-auth:${play_version_old}"
    implementation "com.google.android.gms:play-services-maps:${play_version_old}"
    implementation "com.google.android.gms:play-services-location:${play_version_old}"

buildscript{

    ext{
        play_version = '15.0.2'
        play_version_old = '15.0.0' …

我遇到一个问题,如果一个Screen(ViewController)已经在堆栈中,那么它可以再次打开.设V1是视图控制器.我从V1到v2转到V1-> V2而不是V2-> V3.现在我想从V3打开V1.我正在使用NavigationViewController打开屏幕 -

let help = V1(nibName : "V1" , bundle:  nil)
navViewcontroller?.navigationController?.pushViewController(help, animated: true)

这会创建一个新的V1屏幕我已经无法使用V1了.

请回答这是怎么回事,抱歉错误.